Yarn Weight

Yarn weight describes the thickness of the yarn, typically categorized from very thin lace weight to extremely thick chunky and jumbo yarns.

Category: Yarn

Explanation

Yarn weight describes how thick the yarn is. Standard categories include lace (fingering), sport, DK (double knitting), worsted (aran), chunky, and super chunky/jumbo. The thickness affects which needle size you should use and how quickly the project will progress. Thicker yarn allows for faster progress but fewer details, while thinner yarn takes longer but allows for finer details. Yarn weight is closely linked to yardage: thinner yarn has more yardage per gram.

Also known as: Weight category

The systems and what they leave out

Yarn weight is given as lace, fingering, sport, DK, worsted, aran, bulky and super bulky, with numbered categories in the US standard. The systems are coarse: two yarns in the same category can knit to noticeably different gauges.

Use the category as a first filter and yardage as the number that decides. The ball band gives both.

Weight and purpose

Fingering is used for socks and shawls, DK and worsted for sweaters, bulky for quick projects and outerwear. Finer yarn gives more stitch definition and longer knitting time; heavier yarn gives faster results but coarser detail.

Holding strands together

Two or more fine yarns held together behave roughly as one heavier yarn, and it is a common way to use up leftovers or to add a mohair halo to a plain base.

The result is loftier and lighter than a single yarn of the same nominal weight, so swatch rather than assuming the substitution is exact.

If you cannot tell whether a yarn is DK or worsted, count wraps per inch. It takes two minutes and beats guessing from the ball.

Common mistakes

Choosing yarn on category name alone without checking yardage.
Using heavy yarn for a pattern that depends on fine detail.

Norwegian Term Reference

Reading Norwegian patterns? See the matching term on Strikketips.no:

Garntykkelse Strikketips.no →

Keywords

yarn weight
yarn thickness
gauge

Frequently asked questions

What does category 3 mean?

Roughly DK. But the categories overlap, so always check the yardage and the stated gauge.

Can I hold two fine yarns together instead of one heavy one?

Yes, it is common. Two strands of fingering approximate DK to worsted. Swatch it — the result is loftier than a single heavy yarn.